Lock slider



E. c. HARTLEY- LOCK SLIDER June 29, 1943.

Filed Feb. 25, 1942 INVENTOR ATTORNEY.

a) V FESV pass an. 29,1943

um'rsp sTATes PATENT OFFICE Lo'cx semen Emmett C. Hartley, Mcadville, Pa assignor to Talon, Inc., a corporation of Pennsylvania Application February 25, 1942, semi No. 432,296

.7 Claims. (Cl. 24405.5) I

This invention relates to slide fasteners and,'in particular, to the provision of new and improved sliders therefor.

It is the object of this invention to provide a slider embodying improved locking means effectively preventing accidental unlocking and/or locking of the slider, and which slider is of simple construction, eflicient in operation, and cheap to manufacture and assemble.

. These and other objects and advantages of the invention will appear from the following description taken in conjunction with the accompanying Fig. is an exploded view, in perspective, of

the slider locking member before assembly to the slider body; and

Fig. 6 is a view. similar to Fig. 2 but showing the slider parts in unlocked position.

Referring. to the drawing in detail, the illustrative fastener shown in Fig. 1 comprises a pair of stringer tapes ill, each reinforced at one edge and provided with a row of predeterminedly spaced interlocking fastener members secured to the reinforced edge, in known manner. At the lower ends of the rows of interlocking fastener members, the stringer tapes it are secured together by a conventional bottom stop |2.- Slidable on the rows of interlocking fastener members progressively to engage and disengage them, to close and open the fastener. is a slider constructed according to the principles of this invention and generally designated l4.

The body of the slider I4 is formed by a front wing l5 and a rear wing it connected at their upper ends by a wedge or neck ll. Each of the wings I! and it are provided with marginal side flanges II which form, with the wedge or neck an upwardly diverging substantially Y-shaped.

ture 2! which extends completely through the front wing ll into the channel l9. This aperture 2. receives and guides the locking projection in its tilting movement from unlocked position (Fig. 6) to locked position (Fig. 2), as hereinafter more fully described.

Extending forwardly, or outwardly, from the front wing II is a lug. 2| which extends longitudinally from end to end of the front wing it and overlies the above described locking projectionguiding aperture 20.. The central portion of this lug is cut away to form substantially a loop, to provide an elongatedspace 22 between the lug and the underlying portion of the outer surface of the front wingit adjacent the aperture 20. This space receives the loop or trunnion portions of the locking member which are confined in this space between the lug 2| andthe front wing i5,-

I downwardly, at substantially 90 degrees, a locking projection 29. The locking projection 29 is of substantially circular shape or, in other words, substantially complementary with the above described locking projection guiding aperture 20 which receives and guides the locking projection 29 in its tilting movement from unlocked position '(Fig. 6) to locked position (Fig. 2) as stated above. It will thus be seen that the plate-like member. 25 is substantially in the form of a loop with the locking projection 29 extending at substantially a right angle from the bar portion 28 at the loopv end, or free end portion thereof.

The above described member 26 comprises a substantially rectangular handle-forming plate portion 30 having tabs 3| at each side, which tabs are adapted to be clamped about the ends of the leg portions 21 of the member 25, as shown in Figs. 1, 2 and 4, to secure the outer ends of the members 25 and 28 firmly together to make up the locking member 24. Extending from the plate portion 30 at an acute angle are a pair of similar parallel leg portions 32 which at their inner ends are bent inwardly at 33, at substantially degrees and which terminate in trunnion projections or trunnion forming members 34. These members 34 extend oppositelyand toward one another into close proximity in order to form a trunnion. It will thus be seen that the above described member 26, like the member 25, is also substantially in the form of a loop, the loop portion being substantially closed and forming a trunnion.

In assembling the locking member 24 to the slider body, the leg portions 21 of the member 25 are caused to straddle the lower end portion of the lug 2| and the member 25 is thrust downwardly substantially to the posit-iOn'ShOWn in Figs. 1 and 2. Thereafter, the leg Portions 32 of the member 26 are bent away from one another to a position causing suflicient gap between the trunnion portions 34 to allow the passage of the lug 2| therebetween. The legs are i then released and will snap to their original position wherein the trunnion portions 34 are in close proximity, as shown in Fig. '5. The outer ends of the leg portions 21 are then substantially aligned'with the outer end of the plate portion 36 and the tabs 3| are bent around the outer extremities of the leg portions 21, as shown in Figs. 1, 2 and 6, securely to attach the membars 25 and 26 together.

When the members 25 and 26 are thus attached, the plane of the leg portions 32 is disposed at an acute angle to the plane of the leg portions 21. This angle is preferably "such that a spreading effect is exerted between the free ends of the members 25 and 26 sufilcient normally to spread them apart a greater distance than is permitted by their confinement in wingl5. In other words, there is always sufficient spreading force exerted between the trununlocked until the locking member is brought past dead center, from unlocked to locked position, by force applied to. the locking member.

While the illustrated slider has been shown ap- 5 plied to one conventional formof slide fastener,

it is, of course, applicable to other known forms of slide fasteners. Likewise, while the slider body and lug are shown formed integrally, a, construction particularly adapted to casting and/or molding from metallic or non-metallic materials, it is, of course, to be understood that the slider body and lug are susceptible of construction by other known methods wherein variousparts are securedtogether in known manner to make up a; unitary structure.

Likewise, the above described construction of l the locking member 24 is merely illustrative since the locking member itself or its component partsmay be formed in various ways from various materials. While both the members '25 and 26 are preferably resilient to a rather high degree, resiliency is necessary only in one of these mem-- bers since a spreading force between the loop portions of these members may be readily achieved where only one of them is resilient. However, where both'are resilient the resiliency in the locking projection 29 advantageously re- I lieves the interlocking fastener members II from the space 22 between the lug 2| and the slider nion portions of the member 25 and the locking projection 29 of the member 25 to cause firm engagement between the trunnion formed by the members 34 and the inner surface of the lug 2| and to cause the locking projection 29 to be thrust into engagement with interlocking fastener members in the channel l9 when the member 25 is substantially parallel to the front wing i5, or in the flat 0r locking position of the locking member shown in Fig. 2. In that position it will be noted that the center of the loop or trunnion formed by the projections 34 is disposed downwardly of, or behind, thecenter of movement of the locking projec tion 29 or the free end of the bar portion 28. As shown in Fig. 6, when the locking member 24 is in unlocked position, the center of the trunnion formed by the projections 34 is disposed upwardly of, or forwardly of, that center.

It will thus clearly appear that movement of the locking member from lockedto unlocked position, and vice versa, can b accomplished only I by overloalancing the normal yielding spreading force exerted by the locking member, 1. e., the free end portions, or loop portions, of the members 25 and 26 must be forced together against this resiliency, to move the locking member 24 beyond dead center," from locked to unlocked position and from unlocked position to locked, positiorn This resistance locking member is, of course, enhanced by the friction between the loop portion or trunnion of the member 26 and the inner surface of the lug 6 to accidental movement of the substantial and destructive strains during operation of the locking means.

It is, of course, to be understood that the above description is merely illustrative and in nowise limiting and that I desire to comprehend within my invention such modifications as are included within the scope of the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a slider for slide fasteners including a locking projection at the free end of one of said members guided in said aperture and tiltable into engagement with fastener members in said channel to lock said slider, and a transverse trunnion at the free end of the other of said members disposed between said lug and the slider body and slidably and rotatably engaging said lug, the free ends of said longitudinal members being constantly yieldingly spread apart.

2. In a slider for slide fasteners, a slider body having a fastener member guide channel therein, an aperture communicating with said channel and a lug on said slider body with a portion thereof spaced from said slider body adjacent said aperture, and a locking member comprising a pair of members connected at one end, at least one of said members being yieldable where.-

by the free ends are-constantly spread apart, a

locking projection at the free end of one of said 5 members insertible through said aperture into said channel to lock said slider, and a trunnion at the free end of the other of said members disposed between said lug and the slider body and slidably and rotatably engaging said lug.

3. In a slider for slide fasteners, a body having a fastener member guide channel therein, having an aperture communicating with said channel and a longitudinal ing at the side adjacent said aperture with aportion thereof spaced from said slider body, and a locking member comprising a pair of members connected at one end only and -having their other ends yieldingly spread apart, a locking projection at the free end of one of said members tiltable in said aperture into and out of engagement with fastener members in said channel to lock and unlock said slider, and a trunnion at the free end of the other of said members disposed above said locking member and also between said lug and the slider body and slidably and rotatably'en- Basins said 1118.

4. In a slider for slide fasteners, a slider body having a fastenermember guide channel there-.

in, an aperture communicating with said chan-,

lug and the slider body and slidably and rotat-' ably engaging said lug, the angle between said yieldable members being suillciently great to body with a fastener member guide channel therein, with an aperture communicating with said channel and with a longitudinal lug having a portion overlying said aperture and spaced outwardly therefrom, and a locking member comprising a pair of loop members connected at their outer ends only and with the loop portions at their inner ends confined between said lug and said slider body, a locking projection on the loop portion at the free end of one of said members guided in said aperture and tiltable into engagement with fastener members in said channel to lock said slider, and a trunnion on the loop portion at the free end of the other of said members frictlonally engaging the inner surface of said i lug and slidably and rotatably with respect thereto, the angle between said'yieldable members being such-as normally to spread their inner end portions apart a distance greater than the height of the space between said lug and said slider body, whereby said yieldable members are stressed by theirconflnement of their loop portions in said space.

'7. In a slider, a body having a fastener member guide channel therein with a locking projection guiding aperture extending from one side of said body into said channel, a loop like lug on cause them to be stressed toward one another by confinement between said slider body and said lug, at least in the locking position of said locking member. I

5. In a slider for slide fasteners,a slider body having a fastener member guide channel therein with an aperture extending from one side of said body into said channel, a loop like ing at one side of said slider body with a portion overlying said aperture and spaced from said slider body, and a locking'member comprising a handle portion with a pair of loop members connected thereto at their outer ends only and exsaid slider body with a portion overlying said aperture and spaced outwardly therefrom, and a locking member comprising a pair of loop members connected at one end and extending at an acute angle to one another, at least one of said loop members-being resilient, the loop portions at the free ends of said loop members being disposed between said lug and said slider body, one of said loop portions engaging said lug and the other of said loop portionshaving a1ock ing projection thereon guided in said aperture and tiltable into and out of engagement with fastener members in said channel to, lock and unlock said slider, the angle between said loop members being such as normally to spread said loop portions a distance greater than the space between said lug and said slider body, and the greatest stressing of said locking member by reason of confinement of the loop portions in said space occurring at an intermediate position of said locking member between locking and unlocked positions, defining a dead center past which the locking member must be forced between locking and unlocked positions of said locking member.

' EmIETT C. HARTLEY. 

